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Finding the Fourth Proportional to 521,505.70, 782,258.55 and 403,261.90

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Solution

The fourth proportional to 521,505.70, 782,258.55 and 403,261.90 is: 604,892.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,505.70 : 782,258.55 = 403,261.90 : x
  2. Step 2: Convert to fraction form
    521,505.70/782,258.55 = 403,261.90/x
  3. Step 3: Cross multiply
    521,505.70x = 782,258.55 × 403,261.90
  4. Step 4: Simplify right side
    521,505.70x = 315,455,069,164.25
  5. Step 5: Solve for x
    x = 315,455,069,164.25/521,505.70
  6. Step 6: Final answer
    x = 604,892.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.